Class [Reptilia] Linnaeus, 1758 - reptiles Subclass Lepidosauria Duméril & Bibron, 1839 Order Rhynchocephalia Günther, 1867 - tuataras Suborder †Pleurosauroidea Fitzinger, 1843 [monotypic] 1 Family †Pleurosauridae Lydekker, 1888